Patent US5122123A successfully refreshed from Google Patents.
US2978414A
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Magnetic impulse record carrier
Assignee: Agfa Gevaert NV
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Filing: 1956-06-01
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Granted: 1961-04-04
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Expires: 1976-06-01
Abstract
No abstract record available.
Inventors
- 👤 Harz Walter
- 👤 Bruck Rolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:25
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/706; G11B5/70626; G11B5/70642; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/256; Y10T428/257
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A MAGNETIC IMPULSE RECORD CARRIER CONSISTING ESSENTIALLY OF A LAYER OF A NON-MAGNETIC BINDING AGENT HAVING DISPERSED THEREIN A POWDERY NON-SINTERED FERROMAGNETIC IRON OXIDE, IN WHICH 1.5-4 ATOMIC PERCENT OF IRON ARE SUBSTITUTED BY COBALT, SAID IRON OXIDE BEING OBTAINED BY DISSOLVING A WATER SOLUBLE SALT OF IRON AND A WATER SOLUBLE SALT OF COBALT IN AN AQEOUS SOLUTION THE RELATIVE PROPORTIONS OF SAID SALTS BEING SUCH THAT THE COBALT METALS AMOUNT TO 1.5-4 ATOMIC PERCENT OF THE TOTAL AMOUNT OF METALS C-PRECIPITATING FROM SAID SOLUTION AT A TEMPERA-
Claim 2
Dependent Claim
89 words
A MAGNETIC IMPULSE RECORD CARRIER CONSISTING ESSENTIALLY OF A LAYER OF A NON-MAGNETIC BINDING AGENT HAVING DISPERSED THEREIN A POWDERY NON-SINTERED FERROMAGNETIC IRON OXIDE, IN WHICH 1.5-4 ATOMIC PERCENT OF IRON ARE SUBSTITUTED BY COBALT, SAID IRON OXIDE BEING OBTAINED BY DISSOLVING A WATER SOLUBLE SALT OF IRON AND A WATER SOLUBLE SALT OF COBALT IN AN AQEOUS SOLUTION THE RELATIVE PROPORTIONS OF SAID SALTS BEING SUCH THAT THE COBALT METALS AMOUNT TO 1.5-4 ATOMIC PERCENT OF THE TOTAL AMOUNT OF METALS C-PRECIPITATING FROM SAID SOLUTION AT A TEMPERA-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |